Burnishing rollers for axle lathes



Feb. 25, 1930. A. c. GOUGH BURNISHING ROLLERS FOR AXLE LATHES Filed Feb.15, 1929 2 Sheets-Sheet 1 wl P- fu'uE'.'u&t

J; a? Jr-f/uu- 6T @ouy/z J: LIZ m- Feb. 25, 1930. A. c. GOUGH BURNISHINGROLLERS 'F'OR AXLE LATHES 2 Sheets-Sheet 2 I Filed Feb. 15, 1929 u soPatented-Feb. 25, 1930 Py T STATES; PATENT OFFICE ARTHUR G. GOUGH, OFFITCHBURG, MASSACHUSETTS, ASSI GNGR T MANNING, MAX

; WELL 80 MOORE, INC OF NEW'YORK, N. Y., A CORPORATION OF DELAWAREnunmsnrne ROLLERS For. AXLE LATHES I Application filed February 13,1929. Serial No. 339,670.

The principal object's-of this invention are to provide a pair ofburnishing rollers, one of which can. be located: in place of theturning cutter in a convenient manner; to provide a construction inwhich the rear burnishing roller can be moved back clear of the work andthe cutting tool substituted conveniently for the. front roller when itis. desired to use they machine for turningthe axle to provide a pairofburnishing rollers having a floating support sothat they will notimpart any pressure to the journal itself totend to move it out ofcenter; to provide a machine for turning bothfjournais. of a; carwheelset simultaneously which can be c'hanged over to burnish them, and toprovide such a machine in an extremely simple form;

Other" obj ects' and advantages of the invention will appearhereinafter. J

Reference isto'be had' to the: accompanying drawings in which i a Fig; 1is a side view of one end of an axle turning lathe provided withburnishing rollers in accordance with this invention;

Fig; 2 isa sectional view on the line 2-2 ofFig- 1, showing the machinein the act of turning, with one of the burnishing rollers moved backand. the other removed and: replaced'bya cutting tool;

Fig. 3lis an end View of the tool carriage, showing the arrangement forreleasing it so that it will have a floating support;

Fig; 4' is a sectional view on the line 44 of Fig. 3; p

' Fig. 5 is av ew'like Fig. 2 but with the two burnishing rollers shownin operation;

Fig. 6 is a sectional view on the broken line 66 of'Fig. 5 j v Fig; 7 isa sectional view ontheline7-7 of Fig. 6; I

Fig.8 is a planof the means for opening and closing the half nuts of therear roll support for connecting themwith the feed;

9 is an end view otherwise; like Fig. 7 but showing the half nutsseparated, and

FigIOds-a sectional view onthe line l010 The invention is shown asapplied to a car axle turning lathe which comprises two tail stocks 10,only one of which is shown in the drawings, andv two carriages 11mounted on the bed 12. The bed 12 carries large Vs on the front and rearon which the carriages slide. The two carriages are designed to carrymeans for supporting tools for operation on the two journals of the axleat the same time. I

The details of the machine, which are already known, will not bedescribed in full and it is. sufficient to say that the machine isdriven by a motor 13 through a pair of gears toa driving shaft 17 whichthrough gears, not shown, drives a shaft 19. This shaft through worm andgears 14, drives pini ons to feed the carriages along racks 18. Thegears 1e are provided with a shift mechanism operated by a handle 16 toconnect and dis connect the feed. The carriage can be moved back andforth along the machine by means of a hand wheel 20; On each carriage 11is a front cross-slide 15 and a rear one 36, moved laterally back andforth by a cross screw 21. Each, screw is provided with a hand wheel 22for operating the same.

On the cross screw 21 there are two collars 23 fixed a definite distanceapart and the hand wheel22 is keyed on the end of the screw. For apurpose to be described the screw is designed to be set loose so that itremains a floating screw. Normally it is connected with the carriage bymeans of a swinging plate 24- pivoted on a bolt or stud 25 and havingslots 26 and 27 open at one side. One of these slots is to receive thescrew 21 when the plate 2iisin the full line position in Fig. 3 and theother is to receive another bolt 28. When in that position the turningof the screw by the hand wheel will operate a nut or the l'ike on thescrew to move the same. When the plate 2 1 is turned out of the way sothat it does not engage between the collars 23, as indicated in dottedlines in Flg. 3,. the screw is loose and can float back and forth acrossthe machine. This is employed inthe: burnishing operation only.

On the cross slide 15 is located a tool post 30 which is adapted toreceive the shank of a cutting tool 31 or the shank 32' of a hurni'slring tool 33. This is cal'led'the' front burnishing roll and it has anintegral shank mounted in roller bearings on a casing 34.

nishing the ournals of the wheel set. In this position the plate 24 isswung down as indicated so that the screw 21 is free to move back andforth, so that the two burnishing rolls 33 and are in contact with theopposite sides of the journal at each end and act'upon them with thedesired degree of pressure. It

will be seen therefore that the pressure. of each burnishing roll on'theaxle is equalized and no end thrust is taken by the screw or by thecross slide. The regular feed mechanism of the axle lathe is employedfor moving the burnishing rolls along. the axle.

When it is desired to stop burnishing and use the machine for itsordinary purpose of truing up the journals with the lathe tools 31, thecross slide '36 is moved back by rotation of the hand wheel 22 until itis clear out of the way, as shown in Fig. 2 and released as describedbelow. The front cross slide 15 is used in the same way as before andthe screws on the tool post 30 are loosened up, each shank 32 taken outand the tools 31 put in.

b In order to operate the cross slide 36 by the cross screw 21, thecross slide 36 is provided with a pair of half nuts 41 for engaging thescrew'2l as shown in Figs. 6 and 7. Each of these nuts is formed ofbronze, orlined with it, and they are provided with vertical pins 42.These pins project into a cam plate 43 which has two slots 44 for thepins. This plate is mounted to turn on a stationary vertical stud 47 andhas a handle 45 e for turning it.

l/Vhen it is desired to release the cross slide 36 from the screw 21 thehandle 45 is turned from the position indicated in Fig; 6 to thatindicated in Fig. 8. This carries with it the plate 43 and the slots 44by their motion move the pins outwardly so that the half nuts 41 moveout to the position shown in Fig. 9. Thereafter the turning of the screw21 to adjust the tool 31'will not-affect the position of the crossslide'36 for the rear burnishing roll.

It'will be seen that the machine comprises two tail stocks and twocarriages mounted on a bed, each carriage having a front and rear crossslide which supports the burnishing rolls and burnishesboth journals ofthe axle at the same time. The tail stocks are furnished by the carriage11 under the front burnishing roll the'span of the carriage bridge isreduced.

The drives are as simple as possible. A

quick-acting, three jaw, self-centering chuck 46 is furnished. Thischuck is provided with a gear which meshes with a gear on the main driveshaft 17 of the machine, thus providing for driving the wheel set;directly and also feeding the cutting tool, if desired.

Although I have illustrated and described only one form of the inventionI am aware of the fact that modifications can be'made therein by anyperson skilled inthe art without departing from the scope of theinvention as expressed in the claims.

Therefore,.I do not wish to be limited in this respect but what I doclaim is 1. Ina burnishing machine, the combination with a lathecarriage, of means movable with said carriage for mounting a pair ofburnishing rolls, one on each side of the work, and meansfor moving therear burnishing roll back directly away from the other and clear of thework, the carriage being adapted for carrying a cutting tool in thelocation'ofv I to free the adjusting means from the carriage and allowthe two burnishing rolls to float.

3. In a burnishing machine, the combinati on with a lathe bed and acarriage mounted thereon, of two separate cross'slides for twoburnishing rollers, one on each side ofthe work, a cross screw foradjusting the cross slides, movable means for connecting the cross screwwith the carriage, whereby said means can be moved to free the screwfrom the carriage and allow the two burnishing rolls to float toequalize the pressure of the two rolls on the journal.

4. In an axle lathe,- the combination with a bed and a carriage movablethereon, of a cross screw having a pair of fixed collars 7 thereon, amovable plate connected with the carriage and having an open slotforengagthe screw is fixed lengthwise with respect to the carriage,whereby when said plate is taken out from between the collars the screwwill be free to float, a pair of cross slides having screw threads forconnecting them with the screw and burnishing rollers'carried by saidslides and adapted to engage the work on diametrically oppositesides.

In testimony whereof I have hereunto affixed my signature.

ARTHUR. C: GOUGH.

